Livable buildings can be created from shipping containers, the big rectangular corrugated metal things stacked at docks by giant cranes. There are large and impressive shipping container homes in numerous countries. Containers can be used for affordable housing too; for example, in Washington, DC an apartment building for students is being constructed from containers. And single containers can make affordable single-family homes. Kentucky Habitat for Humanity is constructing a prototype in Upton, a town of 680 an hour south of Louisville.
What does a container house look like? Most photos online show corrugated, painted exteriors. The interiors vary widely depending on the size of the container(s) used and how many containers are combined.